AC ELEVATOR CONTROL CIRCUIT

The primary voltage supplied to the induction motor is controlled to control the motoring torque in the acceleration mode and in the rated-speed runing mode, while, in the deceleration mode, a power converter unit (PC) suipplies AC power of low frequency to the induction motor to apply regenerative...

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Bibliographic Details
Main Authors HADAKEMIYA, TAKANOBU, SIMA, SEIYA, MITZUI, NOBUO, KURIHIRA, TOMIYAKI, MAEDA, YASUYUKI, KOMURO, KATSU
Format Patent
LanguageEnglish
Korean
Published 21.12.1984
Edition3
Subjects
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
ELEVATORS
ESCALATORS OR MOVING WALKWAYS
GENERATION
HAULING
HOISTING
LIFTING
PERFORMING OPERATIONS
TRANSPORTING
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Summary:The primary voltage supplied to the induction motor is controlled to control the motoring torque in the acceleration mode and in the rated-speed runing mode, while, in the deceleration mode, a power converter unit (PC) suipplies AC power of low frequency to the induction motor to apply regenerative braking. A full wave bridge circuit including thyristors is connected at its AC terminals to the 3-phase power source. The connections between the thyristors are suitably switched over to serve both the control of the motoring torque and the control of the braking torque.
Bibliography:Application Number: KR19810002547